The Conversation

Surveillance expert Harry Caul is hired by a mysterious client's brusque aide to tail a young couple. Tracking the pair through San Francisco's Union Square, Caul and his associate Stan manage to record a cryptic conversation between them. Tormented by memories of a previous case that ended badly, Caul becomes obsessed with the resulting tape, trying to determine if the couple are in danger.The Conversation featuring Gene Hackman and John Cazale is streaming with subscription on Prime Video, free on Popcornflix, streaming with subscription on Kanopy, and 5 others. It's a crime and drama movie with a very high Rotten Tomatoes (critics) score of 98% and a high IMDb audience rating of 7.8 (88,707 votes).